They grew thick feather coats.
No.
They didn't live during the ice age.
yes penguins,artic terns , albatross and ptarmigans.
no
The group name for ptarmigans is COVEY
Penguins live in Antarctica, if that is where you mean.
The Ice age
they live in caves and migrate in groups
Yes. We currently live in an "interglacial period" of the Quaternary Ice Age. Some people confuse "ice age" with a "glacial period" within an ice age.
They didn't. There was not a single elephant which was alive when the Ice Age began, and still alive when the Ice Age ended. Elephants live a long time, but nowhere near as long as the Ice Age lasted.
Somehow. They may have hunted.
There are various species of ptarmigans and they live in different parts of the world. They have many predators. These include members of the crow family, foxes, pine martens, mink, weasels, and a range of Birds of Prey.